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EWG's Tap Water Database — 2021 UPDATE

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Selenium

City of Highland Village

Selenium is an essential element in diets. But too much selenium can decrease thyroid hormone production and cause hair loss, skin lesions and brittle fingernails.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016ND50ND
2017ND50ND
2018N/A00N/A
2019ND50ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 30 ppb

The EWG Health Guideline of 30 ppb for selenium was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hair loss and nail damage.

EPA Maximum Contaminant
Level (MCL) 50 ppb

The legal limit for selenium, established in 1991, was based on human epidemiological studies of populations exposed to naturally occurring selenium in drinking water. This limit does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Lab ID Result
2016-03-16Q1611305004ND
2016-06-07Q1622614007ND
2016-06-07Q1622614008ND
2016-06-27Q1625972006ND
2016-06-27Q1625972007ND
2017-06-15Q1725217004ND
2017-06-15Q1725217028ND
2017-06-15Q1725217005ND
2017-06-15Q1725217031ND
2017-06-15Q1725217006ND
2019-08-08Q1953062006ND
2019-08-08Q1953062007ND
2019-08-08Q1953062008ND
2019-08-08Q1953062009ND
2019-08-08Q1953062010ND